1. Select flash mode as E-TTL II mode.2. Half press camera's shutter button to focus, and onthe flash screen the aperture and effective range etc.parameters will be displayed.3. Ensure that the subject is in the effective flash range,full press camera’s shutter button to shoot, theflash will be fire according to the setting.※ Exposure lever increments may set to 1/3-stop viathe camera.E-TTL II meteringFEL: Flash Exposure LockModeling flashAutomatic Flash (E-TTL II)Fully-automatic Flash Shooting12vThe following E-TTL functions are advancedapplication, please refer to the usermanual by themanufacturer of the camera and flash.